"Temperatures have dropped but we are working in quite difficult country and experiencing dry conditions and that is causing erratic fire behaviour, which firefighters are working hard to deal with," she said.

She says difficult terrain is also impeding firefighters' efforts.

"We are having to continue doing back-burning and dozer lines on these fires," she said.

"Crews are experiencing south-westerly winds on the fire, which should assist them, but we do need to be careful about windy conditions."